How much heat does a 40 W bulb generates in one hour ?
How much heat does a 40 W bulb generates in one hour ?
A. 144000J
B. 144J
C. 1.44J
D. 14J
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In the capacitive circuit the current___________________?
In the capacitive circuit the current___________________?A. Lags behind voltage by π/2
B. Is in phase with voltage
C. Opposite in phase of voltage by π
D. Leads forward the voltage by π/2The minimum wavelength of X-rays can further be reduced by _______________?
The minimum wavelength of X-rays can further be reduced by _______________?A. Reducing the pressure or cooling the target
B. Increasing the temperature of the filament.
C. Using a target element of higher atomic number
D. Increasing the potential difference between the cathode and the targetThe magnitude of i^. (j^ x k^) is________________?
The magnitude of i^. (j^ x k^) is________________?A. 0
B. 1
C. -1
D. i^If one or more of the neutrons emitted during fission cab be used to build up further fission then the reaction is self-sustained and is known as __________________?
If one or more of the neutrons emitted during fission cab be used to build up further fission then the reaction is self-sustained and is known as __________________?A. Fission reaction
B. Fusion reaction
C. Chain reaction
D. Chemical reactionResistance of a conductor depends upon_________________?
Resistance of a conductor depends upon_________________?A. nature of conductor
B. dimension of conductor
C. physical state of the conductor
D. all of aboveThe working of transistor as amplifier is similar to________________?
The working of transistor as amplifier is similar to________________?A. Step up transformer
B. Step down transformer
C. Three diodes in common
D. Triode vacuum tube